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Topic: Bladder Tank for Air System (Read 664 times) previous topic - next topic

Bladder Tank for Air System

I have a smaller tank ahead of my front and rear main air tanks.  This smaller tank is about the same length as my Front and rear air tanks, but is smaller in diameter.  There is what looks like a very small plug at one end.  This item has a hole in it which leaks the air from both front and rear tanks I believe.  Can someone tell me what this "plug" is and can it be removed and replaced?  In the picture it looks like it sticks out more than it does.  There is some rubber stuff around it, maybe someone patched over the hole, the rubber stuff came off,  and now it is leaking badly.

Herb and Willie
Escapees 90802
2014 IH-45 Build 6581
2002 U320 40' AGDS Build 6021 Sold
1999 U320 36' No Slides Sold
2007 Monaco Dynasty Diamond IV Sold
2005 Discovery 39 Sold
1986 20' Wilderness TT,  Died a natural death after floods, etc.
Walldog's Journeys
And Willie Said

Re: Bladder Tank for Air System

Reply #1 –
Looks to me like someone put a patch on the tank.  New tanks are not that expensive.  I'd consider a new tank.  I think I remember a recent tank replacement thread.

Rich
Rich and Peggy Bowman
2002 U270 3610 WTFS, build #5939--"Freedom"
2022 Jeep Grand Cherokee Summit 4xe
SMI AirForceOne brake system
PakCanoe 15

Re: Bladder Tank for Air System

Reply #2 –
I will see if FOT has it available  thanks Rich.
Herb and Willie
Escapees 90802
2014 IH-45 Build 6581
2002 U320 40' AGDS Build 6021 Sold
1999 U320 36' No Slides Sold
2007 Monaco Dynasty Diamond IV Sold
2005 Discovery 39 Sold
1986 20' Wilderness TT,  Died a natural death after floods, etc.
Walldog's Journeys
And Willie Said

Re: Bladder Tank for Air System

Reply #3 –
Check this thread out for more info.

HWH Aux air pressure tank

Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: Bladder Tank for Air System

Reply #5 –
I decided to change out the tank.  Tryng to get the air all out first.  I may have another problem, the pinhole has been draining the brake system tanks also.  I see on the diagram a line that runs to the wet tank from the slide bladder tank.  I have the tank emptying and now the front and rear brake tanks are also slowly emptying.  I have the drain valve open on the slide bladder tank, but still getting a force of air and there is a gauge under the coach on the front tank that is slowly going down. QUESTION: Is this normal? I have 4 blocks on the front and two on the back for protection if the air bags lose air for some reason.  The air bags are new.  I will soon be ready to remove the connections from the tank.  The flexible tubing air lines must be removed first before the fitting will turn.  I think the procedure is to use an open end wrench the right size to push or hold the moveable part of the plastic and pull out on the line.
Herb and Willie
Escapees 90802
2014 IH-45 Build 6581
2002 U320 40' AGDS Build 6021 Sold
1999 U320 36' No Slides Sold
2007 Monaco Dynasty Diamond IV Sold
2005 Discovery 39 Sold
1986 20' Wilderness TT,  Died a natural death after floods, etc.
Walldog's Journeys
And Willie Said

Re: Bladder Tank for Air System

Reply #6 –
Not normal for my coach. In mine there is a check valve in line #57 which prevents the chassis from bleeding into the HWH system.  Take a close look at your air schematic again. If it indicates a check valve, then yours has failed.

Yes. Remove the flex tubing first. It is a compression fitting. Remove the nut and pull the tube retaining the compression sleeve on the tube.
Dan & Lauren - Pine Ridge, FL
2000 U320 42 CAI
Build #5766

Re: Bladder Tank for Air System

Reply #7 –

Well I got the tank out.  The fittings were 90 els with push on connections to air piping.  I finally got one off and then I realized that the ninety el swiveled, so I could unscrew it from the bung and leave the plastic tubing connected.  Anyway the tank measures 30 inches port to port on the ends and diameter of 9 inches which to me translates to 5 gallon capacity.  I think I should put back at least the size I took out.  Found one on Amazon for $163 delivery next week.  May shop around some more before ordering.  This one is very close to my size I will have fabricate some brackets to use it though.

Amazon.com: Vixen Air 5 Gallon (18 Liter) 9 Ports Suspension/Air Ride/Bag/Tra...

As an Amazon Associate Foretravel Owners' Forum earns from qualifying purchases.
Herb and Willie
Escapees 90802
2014 IH-45 Build 6581
2002 U320 40' AGDS Build 6021 Sold
1999 U320 36' No Slides Sold
2007 Monaco Dynasty Diamond IV Sold
2005 Discovery 39 Sold
1986 20' Wilderness TT,  Died a natural death after floods, etc.
Walldog's Journeys
And Willie Said

Re: Bladder Tank for Air System

Reply #8 –
Did considerably more research before ordering the replacement tank.  Some calculations indicated that the FOT installed tank was a little over 6 gallons or 1425 Cu Inches in volume.  The reason I know is I found the exact replacement.  FOT installed a Haldex Part #19810 which has saddle brackets on each end for mounting.  After 20 years, Haldex is still making the tank and they are readily available from a variety of sources.  So rather than reinvent the wheel, I would rather not fabricate new mounts while under my coach on a creeper.  The specs for my tank are here 19810 - Reservoir - Haldex product This is for my build number, yours maybe different. 

I ordered the tank from here 19810 by HALDEX - Air Brake Reservoir - Single Compartment, Saddle-Mounted,...
Herb and Willie
Escapees 90802
2014 IH-45 Build 6581
2002 U320 40' AGDS Build 6021 Sold
1999 U320 36' No Slides Sold
2007 Monaco Dynasty Diamond IV Sold
2005 Discovery 39 Sold
1986 20' Wilderness TT,  Died a natural death after floods, etc.
Walldog's Journeys
And Willie Said

Re: Bladder Tank for Air System

Reply #9 –
Quote from: Herb Stark –
Did considerably more research before ordering the replacement tank.  Some calculations indicated that the FOT installed tank was a little over 6 gallons or 1425 Cu Inches in volume.  The reason I know is I found the exact replacement.  FOT installed a Haldex Part #19810 which has saddle brackets on each end for mounting.  After 20 years, Haldex is still making the tank and they are readily available from a variety of sources.  So rather than reinvent the wheel, I would rather not fabricate new mounts while under my coach on a creeper.  The specs for my tank are here 19810 - Reservoir - Haldex product This is for my build number, yours maybe different. 

I'm showing the same p/n tank was used from roughly the first slide coach at least through 2003.



I put a copy of this post in the Part Number Collection sticky topic.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Bladder Tank for Air System

Reply #10 –
That is way bigger than my bladder tank for a single room slide in 2000. Is this for multiple slides, air awnings, etc?

Quote from: Michelle –
I'm showing the same p/n tank was used from roughly the first slide coach at least through 2003.



I put a copy of this post in the Part Number Collection sticky topic.
Dan & Lauren - Pine Ridge, FL
2000 U320 42 CAI
Build #5766

Re: Bladder Tank for Air System

Reply #11 –
Quote from: Blueeyedme –
That is way bigger than my bladder tank for a single room slide in 2000. Is this for multiple slides, air awnings, etc?


Nope.  The Parts Manual for a 2003 U320 shows Foretravel started using that tank beginning with coach 5643.  There were no air awnings after the 2002 model year (and that might have been the only one with an air awning).  Odd that yours (5766) uses a different tank.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Bladder Tank for Air System

Reply #12 –
Quote from: Blueeyedme –
That is way bigger than my bladder tank for a single room slide in 2000. Is this for multiple slides, air awnings, etc?

My coach does have two slides and it came with an automatic awning.  PO replaced automatic awning with manual awning. and I have removed the air steps with a conversion from Extreme.  So I probably could do with smaller.  but how much and I would have to figure out how to mount a smaller tank.  Thanks
Herb and Willie
Escapees 90802
2014 IH-45 Build 6581
2002 U320 40' AGDS Build 6021 Sold
1999 U320 36' No Slides Sold
2007 Monaco Dynasty Diamond IV Sold
2005 Discovery 39 Sold
1986 20' Wilderness TT,  Died a natural death after floods, etc.
Walldog's Journeys
And Willie Said

Re: Bladder Tank for Air System

Reply #13 –
Quote from: Michelle –
Nope.  The Parts Manual for a 2003 U320 shows Foretravel started using that tank beginning with coach 5643.  There were no air awnings after the 2002 model year (and that might have been the only one with an air awning).  Odd that yours (5766) uses a different tank.

Interesting.  I've seen 5688 and it's the same tank as mine so maybe their record keeping wasn't so good. 😎
Dan & Lauren - Pine Ridge, FL
2000 U320 42 CAI
Build #5766

Re: Bladder Tank for Air System

Reply #14 –
One or more of the messages of this topic have been moved to Foretravel Tech Talk - https://www.foreforums.com/index.php?topic=46361.0 - separate discussion of aux compressor, not slide bladder tank.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Bladder Tank for Air System

Reply #15 –
Interesting. When I first found my leaking tank, I did not think it held more than a couple of gallons. However Haldex says that my tank which is round 8 inches diameter and 30 inches long holds 1425 cu inches or 6.1 gallons volume. It did not seem that large to me at first.
Herb and Willie
Escapees 90802
2014 IH-45 Build 6581
2002 U320 40' AGDS Build 6021 Sold
1999 U320 36' No Slides Sold
2007 Monaco Dynasty Diamond IV Sold
2005 Discovery 39 Sold
1986 20' Wilderness TT,  Died a natural death after floods, etc.
Walldog's Journeys
And Willie Said
 

Re: Bladder Tank for Air System

Reply #16 –
Quote from: Herb Stark –
Interesting. When I first found my leaking tank, I did not think it held more than a couple of gallons. However Haldex says that my tank which is round 8 inches diameter and 30 inches long holds 1425 cu inches or 6.1 gallons volume. It did not seem that large to me at first.

A little longer than a "corny" keg (for us homebrewers)  ;)
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320